A novel synthesized Vanillin-Based Deep Eutectic Agent (V-DEA) mitigates postharvest fungal decay and improve shelf life and quality of cherry tomatoes.

Fusarium oxysporum and Botrytis cinerea are the main pathogens that cause fruit decay and reduce the postharvest shelf life of cherry tomatoes. Boosting the potency of natural products requires implementing structural modification to combat postharvest pathogens. Herein, we developed a novel Vanillin-Deep Eutectic Agent (V-DEA) from natural compounds and evaluated its effectiveness against tomato fruit rot pathogens.

Preparation of Vanillin-Taurine Antioxidant Compound, Characterization, and Evaluation for Improving the Post-Harvest Quality of Litchi.

Litchi's post-harvest pericarp browning is one of the main constraints that drastically affect its visual attributes and market potential. Therefore, the vanillin-taurine Schiff base (VTSB) compound prepared from natural compounds of vanillin and taurine exhibited higher DPPH-radical-scavenging invitro antioxidant activity than vanillin. VTSB first-time report to mitigate the postharvest browning of litchi fruit.

Interrogating Raisin Associated Unsaturated Fatty Acid Derived Volatile Compounds Using HS-SPME with GC-MS.

This study proposed to investigate the generation mechanism of raisins-derived volatile compounds during unsaturated fatty acids oxidation (UFAO) using a mixture of fatty acids (FAs) and four individual FA at different time intervals (0, 4, 8, 12, 16, and 20 days; 60 °C). During the sun-drying of 'Thompson Seedless' grapes ( L.), a total of 39 UFAO-derived volatiles were characterized by the GC-MS.

-Methylation of carboxylic acids with streptozotocin.

The clinically used DNA-alkylating drug streptozotocin (STZ) was investigated using a simple work-up as an -methylating agent to transform various carboxylic acids, sulfonic acids and phosphorous acids into corresponding methyl esters, and did so with yields of up to 97% in 4 h at room temperature. Good substrate tolerance was observed, and benefited from the mild conditions and compatibility of the reaction with water.

The one-pot synthesis of butyl-1H-indol-3-alkylcarboxylic acid derivatives in ionic liquid as potent dual-acting agent for management of BPH.

Based on the SAR of both α-AR antagonists and 5α-reductase (5AR) inhibitors, the dual-acting agent 4-(1-(4-(4-(2-methoxyphenyl)piperazin-1-yl)butyl)-1H-indol-3-yl)butanoic acid 4aaa was designed against BPH and synthesized by two steps of N-alkylation. One-pot protocol towards 4aaa was newly developed. With IL [Cmin]Br as solvent, the yield of 4aaa was increased to 75.

Diastereoselective Synthesis of 3,4-Dihydropyran-3-carboxamides with in Vitro Anti-inflammatory Activity.

A versatile and economical reaction of diketene (), aryl amines , cyclic 1,3-diketones , primary amines , and aryl aldehydes was explored to synthesize 3,4-dihydropyran-3-carboxamide derivatives under mild conditions. Three stereogenic centers are generated in the products, and the structure of the major diastereomer of {,,,} was identified by X-ray diffraction and 2D NMR spectroscopy. The scope and limitation investigation provided two series of (2,3,4)-chromene-3-carboxamides in good to excellent yields with high diastereoselectivity.

"On-Water" Synthesis of Quinazolinones and Dihydroquinazolinones Starting from -Bromobenzonitrile.

A versatile and practical "on-water" protocol was newly developed to synthesize quinazolinones using -bromobenzonitrile as a novel starting material. Studies have found that air as well as water plays an important role in synthesis of quinazolinones. Further investigation indicated that dihydroquinazolinones can be prepared with this protocol under the protection of N₂.

"On-Water" Facile Synthesis of Novel Pyrazolo[3,4-b]pyridinones Possessing Anti-influenza Virus Activity.

A facile and versatile "on-water" protocol for the synthesis of pyrazolo[3,4-b]pyridinones was developed by the unprecedented construction of two rings and five new bonds in one-pot. It was proved that water was an important promoter of the reaction and PEG2000 was found to improve the reaction in terms of yield. 32 Derivatives were newly synthesized and most of them were prepared in an hour.

Investigational hemagglutinin-targeted influenza virus inhibitors.

Seasonal influenza and pandemic outbreaks typically result in high mortality and morbidity associated with severe economic burdens. Vaccines and anti-influenza drugs have made great contributions to control the infection. However, antigenic drifts and shifts allow influenza viruses to easily escape immune neutralization and antiviral drug activity.

A domino synthesis of benzoquinolinamide in the presence of iodine.

The domino synthesis of benzo[f]quinolinyl and benzo[h]quinolinyl acetamides from diketene, amines, aromatic aldehydes and naphthalenamine was developed, and the catalyst iodine was found to be crucial to the reaction. The structure was deduced from the mass spectrum, (1)H NMR, (13)C NMR spectrum and 2D NMR performed on two representative products.

Iodine catalyzed one-pot multicomponent synthesis of a library of compounds containing tetrazolo[1,5-a]pyrimidine core.

Versatile and novel reactions of 5-aminotetrazole with structurally diverse aryl aldehydes and building blocks with active methylene catalyzed by iodine were investigated in a multicomponent one-pot protocol. A series of 5,7-diaryl-4,7-dihydrotetrazolo[1,5-a]pyrimidines C and 5-methyl-7-aryl-4,7-dihydrotetrazolo[1,5-a]pyrimidine-6-carboxylates D were obtained in moderate to good yields. Further exploration rapidly afforded various E in good to excellent yields; in addition, compound F was also obtained under the same condition.

Fluorous Lewis acids and phase transfer catalysts.

The new phase-separation and immobilization technique known as fluorous biphase system (FBS) has become an active topic among researchers in both industry and academia. A series of fluorous biphasic reactions catalyzed by Lewis acid-type metal perfluorooctanesulfonates and metal bis(perfluorooctanesulfonyl)amides are reviewed in this paper. The recent development of fluorous phase transfer catalyst (PTC) is also discussed.